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Round Head Twin Thread (TwinQwik) Pozi Bright Zinc Size 4 X 1/2 Box Quantity 200 Hardened Recessed Steel Zinc Plated Twin Threaded Wood and Chipboard Screws with a round head. Twin threads and a reduced diameter shank, hardened and plated. The twin threads enable the screw to be driven twice as fast, and straighter than ordinary screws. The Plusdrive recess makes driving easier, safer, and more positive, making these screws an ideal choice for power drivers.Round Head Twin Thread (TwinQwik) Pozi Bright Zinc Size 4 X 1/2 Box Quantity 200
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